Useful tips for everyday
Should the variable ID be included in building the model? ID variables like phone number should not be included as predictors, because you are trying…
What is the degree of freedom for lasso? “On the “degrees of freedom” of the lasso” (2007) show that the number of nonzero coefficients is…
What does Arima ( 1, 0, 0 ) mean? ARIMA (1,0,0) = first-order autoregressive model: if the series is stationary and autocorrelated, perhaps it can…
Why are ensembles better than individual classifiers? Ensemble model combines multiple ‘individual’ (diverse) models together and delivers superior prediction power. If you want to relate…
How do you find the coefficient of multiple determination? The coefficient of determination can also be found with the following formula: R2 = MSS/TSS =…
What is the relationship between a PDF and CDF? Probability Density Function (PDF) vs Cumulative Distribution Function (CDF) The CDF is the probability that random…
What is the mode in a set of data? When it’s unique, the mode is the value that appears the most often in a data…
What is the correlation coefficient between the two variables? The correlation coefficient is a statistical measure of the strength of the relationship between the relative…
How do you convert P values to confidence intervals? Steps to obtain the P value from the CI for an estimate of effect (Est) If…
How can I improve my logistic regression? One of the way to improve accuracy for logistic regression models is by optimising the prediction probability cutoff…